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                                <h1 id="&#x5E7F;&#x57DF;&#x7F51;&#x6280;&#x672F;">&#x5E7F;&#x57DF;&#x7F51;&#x6280;&#x672F;</h1>
<p>&#x56E0;&#x4E3A;IPv4&#x5730;&#x5740;&#x77ED;&#x7F3A;&#x7684;&#x95EE;&#x9898;, &#x901A;&#x5E38;&#x662F;&#x4E00;&#x4E2A;&#x5730;&#x533A;&#x53BB;&#x5171;&#x7528;&#x4E00;&#x4E2A;&#x516C;&#x7F51;IP&#x5730;&#x5740;, &#x8FD9;&#x65F6;&#x7528;&#x6237;&#x548C;ISP&#x4E4B;&#x95F4;&#x5C31;&#x8981;&#x901A;&#x8FC7;&#x8F6C;&#x6362;&#x5173;&#x7CFB;, &#x800C;&#x901A;&#x5E38;ISP&#x7684;&#x7F51;&#x7EDC;&#x5C31;&#x662F;&#x5E7F;&#x57DF;&#x7F51;</p>
<p>&#x5E7F;&#x57DF;&#x7F51;&#x662F;&#x8FDE;&#x63A5;&#x4E0D;&#x540C;&#x5730;&#x533A;&#x7684;&#x7F51;&#x7EDC;, &#x8303;&#x56F4;&#x901A;&#x5E38;&#x5F88;&#x5927;, &#x5176;&#x4E2D;&#x6709;&#x5F88;&#x591A;&#x7684;&#x4E09;&#x5C42;&#x8BBE;&#x5907;, &#x4E5F;&#x5C31;&#x662F;&#x8BF4;, &#x5982;&#x679C;&#x4F46;&#x7528;&#x8DEF;&#x7531;&#x534F;&#x8BAE;&#x7684;&#x8BDD;, &#x5E7F;&#x57DF;&#x7F51;&#x7684;&#x901A;&#x4FE1;&#x6548;&#x7387;&#x5C06;&#x4F1A;&#x975E;&#x5E38;&#x5E95;&#x4E0B;</p>
<p>&#x7531;&#x6B64;&#x4EA7;&#x751F;&#x4E86;&#x5F88;&#x591A;&#x4E0D;&#x540C;&#x7684;&#x5E7F;&#x57DF;&#x7F51;&#x534F;&#x8BAE;</p>
<p>&#x5E7F;&#x57DF;&#x7F51;&#x534F;&#x8BAE;&#x6709;PPP/HDLC/FR&#x7B49;, ISP&#x5185;&#x90E8;&#x4E3B;&#x8981;&#x4F7F;&#x7528;ATM, &#x53EF;&#x4EE5;&#x6EE1;&#x8DB3;&#x9AA8;&#x5E72;&#x7F51;&#x7EDC;&#x4E2D;&#x9AD8;&#x901F;&#x8F6C;&#x53D1;&#x7684;&#x9700;&#x6C42;</p>
<h2 id="&#x5E7F;&#x57DF;&#x7F51;&#x8BBE;&#x5907;&#x89D2;&#x8272;">&#x5E7F;&#x57DF;&#x7F51;&#x8BBE;&#x5907;&#x89D2;&#x8272;</h2>
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<ul>
<li>CE---Customer Edge &#x7528;&#x6237;&#x8FB9;&#x7F18;&#x8BBE;&#x5907;</li>
<li>PE---Provider Edge &#x670D;&#x52A1;&#x5546;&#x8FB9;&#x7F18;&#x8BBE;&#x5907;</li>
<li>P---Provider &#x670D;&#x52A1;&#x5546;&#x8BBE;&#x5907;</li>
</ul>
<p>CE&#x4E00;&#x5B9A;&#x4E0E;PE&#x76F8;&#x8FDE;</p>
<h2 id="ppp&#x94FE;&#x8DEF;&#x5EFA;&#x7ACB;&#x6D41;&#x7A0B;">PPP&#x94FE;&#x8DEF;&#x5EFA;&#x7ACB;&#x6D41;&#x7A0B;</h2>
<p>PPP&#x94FE;&#x8DEF;&#x5EFA;&#x7ACB;&#x7531;&#x4E24;&#x7AEF;&#x63A5;&#x53E3;&#x534F;&#x5546;&#x5B8C;&#x6210;, &#x63A5;&#x53E3;&#x7684;&#x72B6;&#x6001;&#x8868;&#x793A;&#x4E86;&#x534F;&#x8BAE;&#x7684;&#x534F;&#x5546;&#x9636;&#x6BB5;</p>
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<li><p>&#x94FE;&#x8DEF;&#x5C42;&#x534F;&#x5546;</p>
<p> Link Control Protocol&#x94FE;&#x8DEF;&#x63A7;&#x5236;&#x534F;&#x8BAE;</p>
<p> LCP&#x7684;&#x62A5;&#x6587;&#x4E00;&#x5171;&#x6709;<em>4</em>&#x79CD;&#xFF1A;</p>
<ul>
<li><p>Configure-Request &#x8BF7;&#x6C42;&#x914D;&#x7F6E;&#x62A5;&#x6587;</p>
<p>  &#x8BE5;&#x62A5;&#x6587;&#x643A;&#x5E26;&#x4E86;&#x8BF7;&#x6C42;, &#x5185;&#x5BB9;&#x4E3A;&#x672C;&#x7AEF;&#x914D;&#x7F6E;&#x53C2;&#x6570;</p>
</li>
<li><p>Configure-Ack &#x8BF7;&#x6C42;&#x914D;&#x7F6E;&#x786E;&#x8BA4;</p>
<p>  &#x672C;&#x7AEF;&#x53C2;&#x6570;&#x4E0E;&#x5BF9;&#x7AEF;&#x53C2;&#x6570;&#x4E00;&#x81F4;&#x5E76;&#x8BC6;&#x522B;, &#x94FE;&#x8DEF;&#x5EFA;&#x7ACB;&#x786E;&#x8BA4;&#x62A5;&#x6587;</p>
</li>
<li><p>Configure-Nak &#x53C2;&#x6570;&#x4E0D;&#x5339;&#x914D;</p>
<p>  &#x672C;&#x7AEF;&#x53EF;&#x8BC6;&#x522B;&#x5BF9;&#x7AEF;&#x53C2;&#x6570;, &#x4F46;&#x662F;&#x53C2;&#x6570;&#x503C;&#x4E0D;&#x4E00;&#x81F4;&#x65E0;&#x6CD5;&#x534F;&#x5546;</p>
</li>
<li><p>Configure-Reject &#x53C2;&#x6570;&#x4E0D;&#x8BC6;&#x522B;</p>
<p>  &#x672C;&#x6BB5;&#x53C2;&#x6570;&#x4E0E;&#x5BF9;&#x7AEF;&#x53C2;&#x6570;&#x4E0D;&#x76F8;&#x540C;, &#x4E0D;&#x53EF;&#x8BC6;&#x522B;, &#x65E0;&#x6CD5;&#x534F;&#x5546;</p>
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<li><p>&#x5BC6;&#x7801;&#x8BA4;&#x8BC1;&#x534F;&#x5546;(&#x53EF;&#x9009;&#x9636;&#x6BB5;)</p>
<ul>
<li><p>PAP---Password Authentication Protocol&#x5BC6;&#x7801;&#x8BA4;&#x8BC1;&#x534F;&#x8BAE;</p>
<p>  &#x94FE;&#x8DEF;&#x534F;&#x5546;&#x6210;&#x529F;&#x540E;&#x7531;&#x88AB;&#x8BA4;&#x8BC1;&#x65B9;&#x53D1;&#x8D77;&#x5BC6;&#x7801;&#x8BA4;&#x8BC1;, &#x5BC6;&#x7801;&#x4E3A;&#x660E;&#x6587;&#x4F20;&#x8F93;</p>
</li>
<li><p>CHAP---Challenge Handshake Authentication Protocol&#x6311;&#x6218;&#x63E1;&#x624B;&#x8BA4;&#x8BC1;&#x534F;&#x8BAE;</p>
<ol>
<li>&#x8BA4;&#x8BC1;&#x65B9;&#x53D1;&#x8D77;&#x6311;&#x6218;&#x8BA4;&#x8BC1;, &#x751F;&#x6210;&#x968F;&#x673A;&#x6570;(&#x6B64;&#x65F6;Code==1)</li>
<li>&#x88AB;&#x8BA4;&#x8BC1;&#x65B9;&#x56DE;&#x590D;&#x7528;&#x6237;&#x540D;&#x548C;&#x4E00;&#x4E32;&#x54C8;&#x5E0C;&#x503C;(id+&#x968F;&#x673A;&#x6570;+&#x5BC6;&#x7801;&#x7684;md5&#x8FD0;&#x7B97;)</li>
<li>&#x8BA4;&#x8BC1;&#x65B9;&#x5F97;&#x5230;&#x5BC6;&#x6587;, &#x8FDB;&#x884C;&#x89E3;&#x5BC6;&#x8FD0;&#x7B97;&#x83B7;&#x53D6;&#x5BC6;&#x7801;, &#x4E00;&#x81F4;&#x5219;&#x8BA4;&#x8BC1;&#x6210;&#x529F;, &#x4E0D;&#x4E00;&#x81F4;&#x5219;&#x5931;&#x8D25;</li>
</ol>
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</ul>
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<li><p>&#x7F51;&#x7EDC;&#x63A7;&#x5236;&#x534F;&#x5546;</p>
<p> Network Control Protocol&#x662F;&#x6700;&#x540E;&#x7684;&#x9636;&#x6BB5;, &#x534F;&#x5546;&#x5728;&#x94FE;&#x8DEF;&#x4E0A;&#x6240;&#x4F20;&#x8F93;&#x7684;&#x6570;&#x636E;&#x5305;&#x683C;&#x5F0F;&#x548C;&#x7C7B;&#x578B;</p>
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<li><p>&#x9759;&#x6001;IP&#x534F;&#x5546;</p>
<p>  &#x9759;&#x6001;IP&#x534F;&#x5546;&#x4E0E;LCP&#x5F88;&#x76F8;&#x4F3C;, &#x4E24;&#x7AEF;&#x534F;&#x5546;&#x90FD;&#x901A;&#x8FC7;&#x4E86;&#x65E2;&#x662F;&#x5B8C;&#x6210;</p>
</li>
<li><p>&#x52A8;&#x6001;IP&#x534F;&#x5546;</p>
<p>  &#x52A8;&#x6001;IP&#x534F;&#x5546;&#x7684;&#x7684;&#x8BDD;&#x5219;&#x662F;&#x5728;&#x7B2C;&#x4E00;&#x6B65;&#x53D1;&#x9001;Request&#x62A5;&#x6587;&#x65F6;, &#x672C;&#x6BB5;&#x8BF7;&#x6C42;&#x4E3A;0.0.0.0&#x7684;&#x5730;&#x5740;</p>
<p>  &#x5BF9;&#x7AEF;&#x63A5;&#x53D7;&#x540E;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x5206;&#x914D;&#x4E86;IP&#x7684;Nak&#x8FDB;&#x884C;&#x534F;&#x5546;</p>
<p>  &#x672C;&#x6BB5;&#x518D;&#x6B21;&#x5229;&#x7528;&#x8FD9;&#x4E2A;&#x65B0;IP&#x5730;&#x5740;&#x8FDB;&#x884C;Request</p>
</li>
</ul>
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